Cutter-head.



(No Model.)

Patented Dct. I6, I900, S. J. SHIMER.

CUTTER HEAD. I (Application filed July 24, 1900.)

No. 659,990. Patented Oct. I6, 1900.

' s. J. SHIMER.

CUTTER HEAD.

, (Applicaion filed July 24, 1900 MBGBU 2 Sheets-Shegt 2.

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SAMUEL J. SI-IIMER, OF MILTON, PENNSYLVANIA.

CUTTER-HEAD.

SPECIFICATION forming part of Letters Patent No. 659,990, dated October 16, 1900.

Application filed July 24, 1900. Serial No. 24,740. (No model.)

To all whom it may concern:

Be it known that I, SAMUEL J. SHIMER, a citizen of the United States, residing at Milton, in the county of Northumberland and State of Pennsylvania, have invented new and useful Improvements in Cutter-Heads, of which the following is a specification.

My present invention relates to rotary cutter-heads; and one of my objects is to provide for the largest possible bit-seat surface in the cutter-head by arranging one of the companion bits concentric to the holding-bolt, while the other companion bit is arranged eccentric thereto, whereby the greatest possible difference is attained between the surface cut of one of the said bits and the extreme cut of the other bit, resulting in a relative enlargement of the smaller companion bit, integrally considered.

Another object of my invention is to provide a cutter-head with bit-seats encircling fixed bosses, which are perpendicular to the bit-seats, but inclined to the plane of revolution of the cutter-head, said bosses having each an eccentric bolt-hole therein, so that the companion bits may be centered to make the differential cut required. Another advantage of this arrangement resides in the fact that when used with an expansible head the expansion or adjustment of the cutterhead sections does not disarrange the relative cutting-surface except as to the width of groove cut by one of each companion bit.

It will be understood, of course, that while I have shown in the drawings a straight-edge bit and a grooving-bit as the companion pair seated together in the cutter-head I may use bits of different cutting edges arranged relatively in the same manner for different classes of work.

In the accompanying drawings, which form a part of this specification, I have selected for the purpose of illustrating my present improvements an eXpansible cutter-head of the Shimer type and have shown bits of a certain contour; but it will be obvious that my invention may be applied to cutter-heads of different types, and bits of other kinds may be used.

In said drawings, Figure l is a plan view of a cutter-head embodying my invention, one of the bits being removed. Fig. 2 is a central vertical section through the cutter head with two of the bits in place thereon. Fig. 3 is a detail perspective view of a beveled washer which I may use in seating one of the bits. Fig. 4 is asimilar view of one of the bits detached from the cutter-head. Fig. 5 is a perspective view of the companion bit.

Like numerals designate like parts wherever they occur in the different views.

The numeral 1 designates the lower section of the cutter-head, and 2 the upper section thereof. Two bit-seats 3 3 are formed in each of the sections 1 and 2 at diametricallyopposite points, and these seats each have the hearing or seat surface 4 inclined from the outer edge of the cutter-head toward the center-that is, inclined inwardly to the plane of revolution of the cutter-head. A boss 5 projects centrally from each bit-seat, and each boss is provided with a bolt-hole 6, which is formed eccentrically in the boss and inclined to the plane of revolution of the cutter-head in agreement with the position given the superposed companion bit. The side walls of the boss are at right angles to the bearing face of the bit-seat formed upon the headfiange, and the upper face of the boss is within the limit of the bit that centers about the boss. The grooving-bit '7, which may or may not be recessed, as at 9, is provided with a central aperture 8, which fits the boss 5. The upper face of the bit 7 may form a seat for the companion bit 11 when used to cut a plain edge. To cut a molded edge, 1 prefer to use a bevel-Washer 12 under bit ll to give it an outward inclination to make an overcut with clearance along the edge of a pattern to be formed. This washer has a central aperture 13 and-a stud or pin 14 projecting into said aperture to fit the groove 15 in the bolt 16. A spline 17 in the bolt-hole 6 also fits the groove 15 in the bolt 16, thus holding the washer 12 and the bolt 16 from turning and permitting the bit 7 to turn on the boss 5 and the bit 11 to turn on the bolt for readjustment as either or both wear away by use.

The operation of my invention will be readlution. The same relative positions of the cutters are retained when the cutter-head is expanded, the width of the groove only being changed by the expansion.

By the construction set forth the bosses form the pivotal centers for one of each pair of the cutters and the bolts form the pivotal centers for the other of each pair of cutters, and the eccentric bolt-hole in the boss gives the required differential set of the two cutters. The inclination of the bit-seats 3 3 and the relative inclination of the bolt-hole 6 may be changed within certain limits for Work of diiferent kinds.

Having thus fully described my invention, what I claim is 1. Acutter-head having a series of bit-seats thereon, said seats each having a concentric boss, an eccentric bolt-hole formed in each of said bosses, in combination with a cutter having a central aperture to fit the boss, and a superposed cutter seated upon said firstmentioned cutter and held in place bya bolt passing through the hole in the boss, substantially as described.

2. A cutter-head provided with a series of inclined bit-seats thereon, a concentric boss rising from each seat, an inclined bolt-hole formed in each boss, a cutter having a central aperture to fit the boss, and a companion cutter superposed upon the first-mentioned cutter and held in place by a bolt passed through the inclined bolt-hole in the boss, substantially as described.

3. A cutter-head having a series of bits secured to seats thereon, said seats being inclined to the plane of revolution of the cutterhead,-and each seat provided with a concentric boss having an eccentric and inclined bolt-hole therein, two bits superposed in each seat and secured in place by a single bolt passing through the bolt-hole in said boss, substantially as described.

4. A cutter-head having a series of bits secured to seats thereon, said seats being inclined to the plane of revolution of the cutterhead, and each provided with a concentric boss having an eccentric and inclined bolthole therein, two bits superposed in each seat and secured in place by a single bolt passing through the bolt-hole in said boss, and a beveled washer interposed between said tWo bits to give the bits opposite inclinations, for the purpose described.

5. A cutter-head provided with inwardlyinclined bit-seats, a pair of bits superposed in each seat and secured by a single bolt, and

an intermediate beveled Washer between the W. H. BECK,

(J. F. BALLIET. 

